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This test is getting close to 30 minutes.  There are 6 test cases, so sharding
it to 2 tests cases per will use 3 machines, and bring test runs closer to ten minutes.

This also renames the test cases to end in TestCase, which is how sharding does it's
math.

Change-Id: I7c4f58e89534b1d526fbfc026cbecb76c61a745e
Reviewed-on: https://chromium-review.googlesource.com/c/1331130Reviewed-by: John Budorick <jbudorick@chromium.org>
Reviewed-by: edchin <edchin@chromium.org>
Reviewed-by: Sergio Collazos <sczs@chromium.org>
Commit-Queue: Justin Cohen <justincohen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607378}